硝酸镧改性壳聚糖对溴离子的吸附性能研究

Study on adsorption behaviors of bromide ion using lanthanum-modified chitosan

研究了硝酸镧改性壳聚糖对Br-的吸附性能,考察了吸附剂用量、时间、温度、pH等条件对吸附性能的影响。结果表明,在优化的吸附条件下,改性壳聚糖对Br-(100 mg/L)和海水样品Br-的平均吸附容量分别为3.229 5、0.669 1 mg/g。而普通壳聚糖对Br-(100 mg/L)和海水样品Br-的平均吸附容量分别为1.793 0、0.736 2 mg/g。普通壳聚糖对Br-的吸附符合Langmuir等温线,而硝酸镧改性壳聚糖对Br-的吸附过程采用Langmuir吸附等温线和Freundlich等温线描述均可。

In this paper,the adsorption capability of Br-on lanthanum-modified chitosan has been studied.The effects of dosage,time,temperature,pH value of Br-on the adsorption had been investigated.The results show that under the best experimental conditions,average adsorption capacities of Br-(100 mg/L) and seawater by lanthanum-modified chitosan are found to be 3.229 5 mg/g and 0.669 1 mg/g,while the chitosan are respectively 1.793 0 mg/g and 0.736 2 mg/g.The Langmuir isotherm gives the best correlation for the ads...